dodge



May 24, v1927. y 1,630,059

A; Y. DODGE BRAKE Filed April 17. 1925 3 Sheets-Sheet 1 n n i jme/250m' HAU/1 Y, 00005 2y w. im

1,630,059 M", 24 1927' A. Y. DODGE BRAKE Filed April 17. 1925 3 Sheets-Sheet 2 A. Y. DODGE BRAKE Filed April 17. 1925 3 Sheets-Sheet 5 Patented May` 24,y `1927. n f :UNITED STATES PATENTvoF-Flc.

' .ADIEL Y. DODGE", 'orsoUTH BEND, INDIANA, AssIeNon To BENDIXl BRAKE COMPANY,

. 0F CHICAGQ, ILLINOIS, A CORIPORATION OF`v` ILLINOIS.

BRAKE.y y

This invention relates toV brakes, an'dis illustrated as embodied in athreefshoe brakev for an automobile. fObjects of this invention are to improve the arrangement of the shoes,` etc., of such a brake, and also to lessenthe-- cost by providing novel/shoes of channel section, which can be pressedv or ystamped of` of the invention, including various novel combinationsl Vof parts andV desirable particular constructions, will be` apparent fromthe following description/.of two illustrative embodiments vshown in the yaccompanying y fthe line '5 5 of Fight;V

drawings,vin which: y ,y y ,y

Fig. 1 is a transverse vertical section ythrough one front brake, together with associated parts of the chassis;A f f Y Fig. 2 is a vertical section on of Fig. 1, showing the brake shoes` in side elevation; .y v Fig. 3 is a section on, the linef3-3 of Fig. 2, showing the anchors of the brake shoes;

Fig. 4 is a bottom plan view of one of the carriers for the cam plates;l f. n

rFi 5 isa section through the carrier, on

Fig. 6 is an end elevation ofone of the shoes, showing the cam plate and its carrier;

one ofthe brake shoes; p l

Fig. 8 is asimilar vsection through a shoe of Vmo'difiedform;` n

` Fig. 9y isa view correspondingto Fig. 3, but showing shoes of modified form;

Fig. 10 isa view corresponding to Fig. 2,:

but showing'somewhatdifferent shoes;

Figllis asection'on the line `A11-11 of Fig. 10, showing the anchor of the shoes; andvk Fig.l `1 2 isa sectiononthe line 12-12 of i Fig. 10, showingjthe connection between the Both arrangements arefillustrate'd as intended for use in' an automobile chassis including a frameflO supported by springs 12 on a rear axle (not shown) and a front axle 14 having the front wheel knuckles 16 swiv-v havinga crossy bore for connecting 'members the-ine afa Fig. ',7 yis a section transversely throughv 26 between which the flattened end of a shaft .28 isswivelled by a pin 30, the whole forming auniversal joint substantially in line with the king pin. The shaft 28` is operated by an arm 32, and is kslidably sup ported at its inner end by ya universa joint.,

34 carried by ythe chassis frame 10.

The brakes themselves are of the 'three-"1 shoe "type, they one in Fig. 2 comprising` a reverse shoe 36 anchored to the backing plate vat 38, a forwardfshoe 40 anchoredat 42v and a servo shoe 44 connected to the forward-shoe atk46. Y

Each shoeis channel shaped in cross section, preferably being formed as infFig. 7, of two Vparts, each L-shaped in cross section,` with superposed circumferential, flanges 48 and opposite radial flanges 50. The rivets 52 of the brake lining 54are shownas pass-I ing throughthe flanges 48. If desired, the shoes may be pressed in channel form' ina singlek piece, as shown at 140 in Fig. 8,;the i other orm Vbeing preferred because in the form` ofFig. 8the circumferential part of' ythe channel must bottom in the die .when the soV shoes arey pressed out, and when released itv cure accurate `curvature of the shoes.' In

the form of Fig. 7, the flanges 50 may bot-A tom in the die,v and a fewdegrees variation` in the spring is not ofimportance.

Thefr'ee ends 4rof shoes 36 and 44iare provided with bracket-shaped carriers` 56 fori steelVA cam pla-tes 58 engaged by the cam 22.y

Each carrier 56 may, if desired, bemade `of the shoe. and bent radially at 62 at the cam end, and also having oppositeradial flanges 64 bent over the radial flanges 62 at 66. The

,plate 58 may be secured rivets 6,8, or in 'two interfitting stampings havingA supera.;

anyvother desired manner. Flanges 64 are formed with slots 70. for posts 72, carrying a plate 74 slidably engaging the edges' of the cam plates 58 to confine the shoes laterally.

As appears -in Figs. 2 and 3, in orderr to give the effect of overlapping the shoes. toy secure the maximum brake "lining surface in engagement with the drum, .each of the shoes 36, and 40`is anchored between :the ends of the other shoe. Anchor 42 for vshoe 40 in t e radial si j e flanges ofrshoe 36,50 V,that

asses throudghjrelatively large openingsVVK .A

narrower than shoe 40, sov that they lit or nest between the radial kside flanges thatshoe. This not onlyl facilitates mounts ingthe-shoes, butV moreover 4the sliding en;

lol

gagementserves as aguide for theshoes. t

The arrangement of l .differs fron'i that` described abovein that it is somewhat cheaper, the overlapping of the shoe anchors' being omitted. Shoes E236 and 240, Correspondingto shoes 36V and40,rare p ivotedvon` i a single anchor .238, bushings 276 or the like being` provided (Fig. il). y Shoes 236 and f'.. Y 244 arey identical and interchangsable,` and are [slightly narrowerthan shoe 240, so that.

they litbetween the radial side flanges of shoe 240 at its opposite ends.

The pivotalV connection between shoes and 240 is the same as between,v shoes 44 andthe connecting. pin,I or-,fpivQt 46 havingt a he adsli ;lably engagingthejhaeking plate 2,0, to senve as a steady rest for the shoes, and passing through bushines.pressedA into openings in the radial side flanges of,` theshoes. e y l In both arra1j1gen'1e1 itsthev reverse andX servo shoesare urged inwardly away from=` the drumby amainspring ySO yconnected1.atr its, Opposite endsto the two shoes. An auxiliary spring 82 is connected atoneen d to. the bachingplate, andy at the other end to,` the servo: shoe near its. pivoted end. Spring` 82 not; only urgesl the connected)` servo` andforward shoe towardthe hackingS plate, to be `steadied by` the headof pin46,` hutalso insures that the forward shoe 40 or 240` willfnot drag, since the spring holds it away fromthe drum until overcome by, circumferentially movememtl of the l servo shoe 44. or 244.

. In the operation of the` brake the reverse.

i shoe 3,6 or 236- is most eeetive to.v retardv rearward movement of; the vehicle,v since the friction. of the drum tends to swing it outwardly on its anchor 'Vhen the vehicle is moving forward, the reversek shoe, is less effective, since the friction of the drum then tends to swing. ity inwardly on its; anchor,4 floutyatV that timethe servo shoe 44 or 244,l snioved counterfclockwise (F 2 or 10)` by the frictionof; the` drumto forcethe for# lWard shoe 40 or 4v240 against the drum.

Vheriveted or otherwise secured.

Moreover the friction-ofi the drum at that time tendsto swing shoe 40 or 240 voutward-ly on its anchor.

The cana onwearwfplate isfseeured tothe end' ofA each shoe 236er 244 hyproviding a substantially radial flange to which it may The flange may be formed in pressing` out the shoe, or

lbyfolding inwardlythe sides, or the sides and,b ottom,I of the channel in the manner shown in F igs. 4 and o. Each ofthe shoes maybe in one piece, as in Fig; S, or in two pieces asin Fig. 7: The free ends ofthe slices areconfinedV laterally by a plate or the'like, Awhich may be secured to the cam,

shoes. Y

lijlhile illustrative embodiments have leen described detail, it is not my intention to limit the scope ofthe invention to those particular embodiments, or otherwise thanv by theftermsof the appended claims.

li claim: l

l. A brake comprising three shoes, the central shoe beine` channeleshaped: at least and whichl projects acrossthe ends ofthe at its ends" and the` two endl shoes extending;`

into the cha'nnelfof the central shoe to Vcause the three shoes to overlap.

2. bralie i comprisingv .a central shoe anchored at one end and channel-shaped at least at the anchored end,an end shoe connected to the unanchoredl end' of the Vcentral shoe andV arranged to operate it., another end shoe extending inside fthe channel' ofthe centrlalushoe to overlap it, a toripie-taliing;v pivot for saidl other end shoe between the ends .of the centralshoe, and brake-applying means acting on Vsaid end shoes.

Al brake comprising, in combination, a pair of shoes of channel section nestedone within the other at their adjacent ends, and

an anchor for eachA shoe extending' .through relatively large openings in the other shoe without interfering.. with the pivotal movementgof the other shoe. l A Y 4. A brake comprising in combination, a shoeof channelsection, anchored` atone end and having relatively largel openingsin its sides some distance" from itsanehored end,

a second4v shoe extending' atene endv het-weeen thesides -of the iirst shoe,4 and lan anchor forY the second shoe passing through said openings wit-houtinterfering. with pivotal movement of the first shoe.

5, Afhrake. comprisine, inV combination.

channel section the first shoe at its unanchored end and connected thereto, and brake-applying means acting onthe second and third shoes.

6. A brakecomprising, in combination, a

drum, a backingl third shoe engageable withy and urged cir-l cumferentially by the drum, the third shoe being connected with one of the pair of shoes, one of the connectedshoes being of channel section and the other extending be-l tween and connected kto thesides of the channel. f

8. A brake comprising, in combination, a channel-section central shoe,`a pair of end shoes extending into'opposite ends kof the channel of the central shoe, and brake-applying means acting on theend shoes and acting on the central shoe through one of the end shoes.

9. vA brake comprising, iny combination, a

` drum, a pair of shoes lof channel section within the drum, the channel ofy one shoe being slightl smaller than, and fitting between the si' es of, the channel of the other shoe, a pivotal connection between said intern fittingsides some distance from the end of the outer shoe, the outer shoesubstantially overhanging the connection, and means for forcing,l one shoe against the 'drum and'causing it to force the other shoe against the drum. i

10. A brake comprising, in, combination., a

pair of shoes having adjacent free ends, a carrier secured to the'end of each shoe and formed with an opening, a cam plate securedto cachee-Prier, a doubleacting cam between the plates, a stationary post on each side of the cam and projecting through the corresponding opening without restricting movement of the shoe by the cam, and a plate secured tothe two posts and crossing thefedges of the two cam tioning they shoes laterally.

v 11. A brake including a drum, a channel-shaped central shoe, shoes extending into opposite ends of the channel of the central plates and posishoe, and means for forcing the three shoes against the 'drum at the Sametime.

12. A brake including a drum, ae/channel-shaped central shoe, shoes extending into opposite ends of thechannel of the central shoe, together with an anchor lfor the side yflanges at one Aend of the central shoe and [between the ends of the corresponding end shoe, and means for forcing the three shoes against vthe drum at the same time.

13. A brake'inclu'ding a channel-sha ed shoe having side flanges comparatively owy at the end of the shoe and sloping to a substantial height rsome distance from the end of the shoe, and another shoe having a part extending between said flan es and pivoted Vto themat a point where 1t ley are of substantial height andy having a `friction part terminating immediately adjacent the end ofthe channel-shaped shoe, so that the channel-shaped shoe overhangs the end of Said other shoe for a considerable distance.

1 14. A brake including an intermediate shoe Vhaving spaced flanges at least at its ends,

lshoes extending between the flanges at opposite ends of thev intermediate shoe, and means for taking the torque of all of the shoes including a. connection between the other shoes. j Y

15. A brake including a channel-section "intermediate shoe and vat least one of the intermediate shoe, shoes extending into the opposite ends of the channel of the intermediate shoe, and means for taking the torqueof all of the shoes includin a connection between the intermediates oe and at least one of the other shoes. i

16. A brake including an intermediate shoe havingspaced flanges at least at its ends, other shoes extending between the llanges at opposite kends of the intermediate shoe,'andbrake-applying meansy acting on the intermediate shoe through at least one `of the other shoes. n

17. Afbrake including a channel-section intermediate shoe and other shoes extending into the opposite ends of the channel of the shoe, and brake-a plyingmeans acting on the. intermediate sioe through at least" one of said other slices.

18. brake mchuhnga. shoeanchored at one end and. having spaced flanges at least Y.at its other end, andanother shoe extending between the spaced flanges and connected to the anchored shoe some distance from its unanchored end.

`In testimony whereof I have: hereunto signed lmy name. f

ADIEL Y. DODGE.

lll) 

